Top 5 Apps for Free GRE Practice Questions and Mock Exams

The GRE rewards volume: students who answer hundreds of practice questions consistently outscore those who merely read prep books. But prep courses cost hundreds of dollars, and not every applicant has that budget. The good news? Some of the highest-quality GRE practice available anywhere is completely free — if you know where to look. Here are the five apps and platforms that deliver real practice questions and full mock exams without costing you a cent.

1. ETS POWERPREP Online — The Free Official Mock Exams

Nothing beats the real thing, and ETS — the company that writes the GRE — gives you two free computer-delivered practice tests through POWERPREP Online.

• What you get: Two full-length practice tests that replicate the actual test interface, including the section-level adaptive design and the on-screen calculator.
• Why it matters: Official questions are the only ones written by actual GRE test developers. Third-party questions approximate the real reasoning patterns; these are the pattern.
• How to use it: Take POWERPREP Test #1 cold as your diagnostic in week one. Save Test #2 for two to three weeks before test day as your dress rehearsal — timed, in one sitting, no interruptions.
• Pro tip: Review your results the same day. The score is useful; the question-by-question breakdown of why you missed items is gold.

2. Magoosh Vocabulary Flashcards — The Daily Habit Builder

Magoosh’s free flashcard apps are the most-downloaded GRE vocabulary tools for good reason.

• What you get: Free access to the high-frequency GRE word list (roughly 1,000 of the most tested words), organized into learning decks by difficulty.
• The mechanics: Each word uses spaced repetition — words you miss come back sooner, words you know recede. You can mark “I knew this” or “I didn’t know this,” and the app builds your review queue automatically.
• Why it works: Vocabulary on the GRE appears in context, and Magoosh’s cards include definitions and example sentences, which trains the context-reading skill Sentence Equivalence questions demand.
• How to use it: 15 minutes daily. On the bus, in line at the coffee shop, before bed. Consistency beats marathon sessions.

3. GregMat (and Vocab Mountain) — The Budget Prep Powerhouse

GregMat has become the most-recommended GRE resource on student forums, and much of it is free or nearly free.

• What you get: The free Vocab Mountain tool lets you test your verbal foundation instantly with no account needed — it’s the fastest way to find out where your vocabulary stands. The GregMat companion app adds vocab and quant flashcards, quizzes, and practice problems.
• Beyond the app: GregMat’s study plans and video classes (available at a famously low monthly subscription if you want to go deeper) are widely credited with massive verbal score jumps.
• How to use it: Start with the free Vocab Mountain foundation test. If your raw recall is below 70%, make vocab drilling your first month’s priority before you touch practice tests.

4. Quizlet — The Custom Deck Machine

Quizlet isn’t GRE-specific, which is exactly what makes it powerful: it’s the place to build and borrow decks tailored to your weaknesses.

• What you get: Thousands of user-created GRE decks (search “GRE vocab,” “GRE math formulas,” “GRE roots and prefixes”), plus the ability to make your own.
• The features that matter: Learn mode (adaptive), Test mode (generates a quiz from any deck), and Match mode (a timed game that builds speed recognition).
• The pro move: Every time you miss a practice question, create a card for the concept — not just the word. After three practice tests you’ll own a personalized deck of exactly the material the GRE keeps punishing you for.
• Caution: Verify user-created decks against official sources; community decks occasionally contain errors.

5. Manhattan Prep / Magoosh Free Practice Tests — The Additional Full Mocks

When you’ve used both free POWERPREP tests, third-party free mock exams extend your full-length testing experience.

• What you get: Major prep companies like Manhattan Prep and Magoosh offer free full-length online practice tests with score estimates and analytics.
• Why you need more than two mocks: Full-length stamina — nearly two hours of sustained focus — is a trainable skill that only develops through repeated complete tests.
• How to use them: Schedule third-party mocks in the middle of your prep timeline. Treat their scores as approximate (third-party scoring can drift from official results) and their question review as the real value.
• Pro tip: Simulate test-day conditions: same start time as your real appointment, phone in another room, one 10-minute break only.

How to Combine Them: A Free Four-Week Plan

1. Week 1: POWERPREP Test #1 (diagnostic) + Magoosh flashcards daily + Vocab Mountain foundation test.
2. Week 2: Daily Magoosh cards + Quizlet deck built from your diagnostic errors.
3. Week 3: One third-party free mock + full error review; flashcards continue.
4. Week 4: POWERPREP Test #2 under exam conditions, light review for the final three days.

This complete program — two official mocks, one third-party mock, adaptive vocabulary, and targeted drilling — costs $0 and rivals paid prep for the self-disciplined student.

The Bottom Line

The best GRE prep isn’t expensive; it’s consistent. ETS’s POWERPREP gives you the official yardstick, Magoosh and GregMat build your vocabulary automatically, Quizlet turns your own mistakes into study material, and free third-party mocks build the stamina that separates a good practice score from a good test-day score.

Your next step: Create your ETS account today and schedule POWERPREP Test #1 for this weekend. Your diagnostic score — not a prep company’s marketing — will tell you exactly where your free study plan should start.